I am going to be a new doc at some point and I want some help. The things I am considering are, Cathcart circle The 313 West Cornwall local dB br 187 NTP heavy freight pack Rhein Ruhr osten Rapid transit Peninsula corridor Diesel legends Hamburg to Lübeck Class 20 Class 31 Which one is best
Of those, I've probably had most play out of Cathcart Circle, Peninsula Corridor (with Baby Bullet and MP15 DLC) and RRO. Rapid Transit is less interesting. The beauty of Peninsula Corridor is that with the loco DLC there's a real mix of services and all of the trains are quite different to each other. RRO is a shorter route, but has closely packed stations so passenger services are busy busy. There's an interesting freight scenario on there too. The 20 and 31 are both good locos, but the 31 best captures the run-down, rattly lows of British Rail being made almost entirely out of rust! I don't have the others, but get the impression that the 313 would be a much better choice than the 187.
Hamburg-Lübeck could be nice, but some services don't work due to a bugged signal. I'd wait for DTG to fix that one. The only other one on your list that I have is Peninsula. I like it, but I understand if people might think it a little boring because it's a straight line for long stretches. It goes through cities, suburbs and open landscape, so the scenery is a little varied. I also got the Baby Bullet loco for it, and that one is a big Diesel beast and quite good. I almost bought Rapid Transit during the sale, but people here said that the Talent 2's sound is bugged and you need a mod to replace it with the functioning Talent 2 from Köln-Aachen. Other than that, I can't speak to the quality of the route. If you're willing to expand your list, I'd suggest Ruhr-Sieg Nord. Scenic, tight curves, lots of speed changes. Passenger and freight services. A similar but faster route, also going down a river valley, is Main-Spessart Bahn.
One additional interesting thing on Rhein-Ruhr-Osten is, that it will bring 117 additional runs on SKA (105 for the BR 422 + 6 for the 185.5 MRCE) and HMA (6 runs with the MRCE 185.5)
If German rail is to your taste, then I would wholeheartedly recommend Riesa-Dresden. Not only is it excellent in itself, but it has supplanted Main-Spessart Bahn as the mother lode of DB rolling stock which layers into other German routes. My other favorites (purely personal): Ruhr-Sieg Nord Clinchfield Northern Trans-Pennine DB BR 101 (not the UK 101!) DB BR 363
The first thing I would probably pick out of that is Peninsula Corridor+MP15 DLC+Baby Bullet DLC. Best pack of services and variety to my taste. The second one is the Chopper (BR Class 20) - really good too, and you get both yard switching and line runs for it. Don't have Cathcart circle, West Cornwal from the list so cant say anything about them.
